/*******************************************************************************
 * Copyright (c) 2002 - 2006 IBM Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package com.ibm.wala.ipa.callgraph.propagation.cfa;

import com.ibm.wala.analysis.reflection.ReflectionContextInterpreter;
import com.ibm.wala.classLoader.IMethod;
import com.ibm.wala.ipa.callgraph.AnalysisOptions;
import com.ibm.wala.ipa.callgraph.ContextSelector;
import com.ibm.wala.ipa.callgraph.IAnalysisCacheView;
import com.ibm.wala.ipa.callgraph.impl.DefaultContextSelector;
import com.ibm.wala.ipa.callgraph.impl.DelegatingContextSelector;
import com.ibm.wala.ipa.callgraph.propagation.ClassBasedInstanceKeys;
import com.ibm.wala.ipa.callgraph.propagation.SSAContextInterpreter;
import com.ibm.wala.ipa.callgraph.propagation.SSAPropagationCallGraphBuilder;

/**
 * nCFA Call graph builder. Note that by default, this builder uses a
 * {@link ClassBasedInstanceKeys} heap model.
 */
public class nCFABuilder extends SSAPropagationCallGraphBuilder {

  public nCFABuilder(int n, IMethod abstractRootMethod, AnalysisOptions options, IAnalysisCacheView cache, ContextSelector appContextSelector,
      SSAContextInterpreter appContextInterpreter) {

    super(abstractRootMethod, options, cache, new DefaultPointerKeyFactory());
    if (options == null) {
      throw new IllegalArgumentException("options is null");
    }

    setInstanceKeys(new ClassBasedInstanceKeys(options, cha));

    ContextSelector def = new DefaultContextSelector(options, cha);
    ContextSelector contextSelector = appContextSelector == null ? def : new DelegatingContextSelector(appContextSelector, def);
    contextSelector = new nCFAContextSelector(n, contextSelector);
    setContextSelector(contextSelector);

    SSAContextInterpreter defI = new DefaultSSAInterpreter(options, cache);
    defI = new DelegatingSSAContextInterpreter(ReflectionContextInterpreter.createReflectionContextInterpreter(cha, options, getAnalysisCache()), defI);
    SSAContextInterpreter contextInterpreter = appContextInterpreter == null ? defI : new DelegatingSSAContextInterpreter(appContextInterpreter, defI);
    setContextInterpreter(contextInterpreter);
  }

}
